Absolutely devastated to hear the awful news about Leah. Amputation is such a difficult thing to come to terms with, especially when she's only 17, bless her. My heart goes out to her and her family and also her boyfriend (?) she was at AT with on Tuesday. It could have been anyone, it's a shame she was so young too.
On another note, the payout for this kind of thing is usually huge. Contrary to what you might believe, probably more of a payout than death, as the loss of a limb is life limiting, rather than life ending. She'll have to live with this for the rest of her life, and someone / something has to pay for that, be it AT themselves, insurance companies, Gerstlauer etc…
I hope this hasn't put too many people of Alton Towers itself, as this could have happened to any other coaster at any other park, it's just a pity it's happened at all! Unless it was human error, I don't feel Alton Towers are to blame here. Taking into account all that was done, including response times, closure of the park & X-sector, NV's response to the media; Kay Burley especially, they've done a mighty good job and should probably be praised (when the time is right) for their crisis management in this horrible situation.
I doubt Leah, her family or her friends will ever visit a theme park ever again, but I really do hope this doesn't affect AT too badly, since it's 99% guaranteed this will never ever happen again.